Many aspects of song learning in songbirds resemble characteristics of speech acquisition in humans. Genetic, anatomical and behavioural parallels have most recently been extended with demonstrated similarities in hemispheric dominance between humans and songbirds: the avian higher order auditory cortex is left-lateralized for processing song memories in juvenile zebra finches that already have formed a memory of their fathers’ song, just like Wernicke’s area in the left hemisphere of the human brain is dominant for speech perception. However, it is unclear if hemispheric specialization is due to pre-existing functional asymmetry or the result of learning itself. Here we show that in juvenile male and female zebra finches that had never heard an adult song before, neuronal activation after initial exposure to a conspecific song is bilateral. Thus, like in humans, hemispheric dominance develops with vocal proficiency. A left-lateralized functional system that develops through auditory-vocal learning may be an evolutionary adaptation that could increase the efficiency of transferring information within one hemisphere, benefiting the production and perception of learned communication signals.

Background: Evidence is needed regarding effective incentive strategies to increase clinician survey response rates. Cash cards are increasingly used as survey incentives; they are appealing because of their convenience and because in some cases their value can be reclaimed by investigators if not used. However, their effectiveness in clinician surveys is not known. In this study within the BRCA Founder OutReach (BFOR) study, a clinical trial of populationbased BRCA1/2 mutation screening, we compared the use of upfront cash cards requiring email activation versus checks as clinician survey incentives. Methods: Participants receiving BRCA1/2 testing in the BFOR study could elect to receive their results from their primary care provider (PCP, named by the patient) or from a geneticist associated with the study. In order to understand PCPs' knowledge, attitudes, experiences and willingness to disclose results we mailed paper surveys to the first 501 primary care providers (PCPs) in New York, Boston, Los Angeles and Philadelphia who were nominated by study participants to disclose their BRCA1/2 mutation results obtained through the study. We used alternating assignment stratified by city to assign the first 303 clinicians to receive a $50 up-front incentive as a cash card (N = 155) or check (N = 148). The cash card required PCPs to send an activation email in order to be used. We compared response rates by incentive type, adjusting for PCP characteristics and study site. Results: In unadjusted analyses, PCPs who received checks were more likely to respond to the survey than those who received cash cards (54.1% versus 41.9%, p = 0.046); this remained true when we adjusted for provider characteristics (OR for checks 1.61, 95% CI 1.01, 2.59). No other clinician characteristics had a statistically significant association with response rates in adjusted analyses. When we included an interaction term for incentive type and city, the favorable impact of checks on response rates was evident only in Los Angeles and Philadelphia. Conclusions: An up-front cash card incentive requiring email activation may be less effective in eliciting clinician responses than up-front checks. However, the benefit of checks for clinician response rates may depend on clinicians' geographic location. Trial registration: ClinicalTrials.gov (NCT03351803), November 24, 2017.

Purpose: Testing for BRCA1/2 mutations has increased among privately insured women in the United States. However, little is known about testing rates or trends among women with Medicaid. We sought to determine whether BRCA1/2 testing rates differed between women with private insurance compared with women with Medicaid in a state where both insurance types cover the test, and to compare testing trends from 2011 to 2015. Methods: We conducted a retrospective cohort study of medical claims from January 2011 through June 2015. We included Massachusetts women aged 18–64 with private insurance or Medicaid and at least 12 months of continuous enrollment. We used multivariable linear regression to examine the association of insurance type, age, and time with testing rates. Results: Mean monthly BRCA1/2 testing rates were lower among women with Medicaid compared with those with private insurance. Among privately insured women, mean monthly rates rose from 9.3 per 100,000 in 2011 to 18.4 per 100,000 in 2015, while among Medicaid-insured women, rates increased from 3.7 to 14.7. There was no difference in the monthly rate of increase in both groups (P=0.07). In adjusted analyses, rates were lower among Medicaid-insured women (7 fewer tests per month than privately insured women, P<0.001), and differed by age, with women aged 44–54 most likely to receive testing and women 18–34 the least likely. Conclusion: BRCA1/2 testing rates were lower among women insured by Medicaid compared with those with private insurance, though rates increased from 2011 to 2015 among both groups of women at a similar rate.

Purpose Diagnostic breast ultrasound (US) can be an important tool for the early detection of breast cancer in low-resource settings where efficient strategies to refine the likelihood of malignancy among palpable breast masses are needed. However, the feasibility and clinical role of breast US in such settings has not been described. We trained four general practitioners and five nurses in diagnostic breast US at a rural Rwandan district hospital that serves as a cancer referral facility. We examined management plans, biopsy rates, and patient diagnoses after trainee breast US to determine the impact on clinical care. Methods We abstracted US assessment forms and medical records to determine outcomes from trainee US during 21 months of in-person and electronic training by Boston-based radiologists. We examined management plans, biopsy rate, cancer detection rate, rate of benign diagnoses, and cancers diagnosed among patients discharged after initial evaluation. Results Between January 2016 and September 2017, 307 patients had trainee-performed diagnostic breast US. After US, 158 (51%) were recommended to undergo biopsy, 30 (10%) were recommended to have aspiration/drainage, 49 (16%) were recommended for clinical/US surveillance, one (0.3%) was referred elsewhere, 65 (21%) were discharged, and four—all with no abnormalities on US—had missing recommendations. Of those recommended for initial biopsy, 151 patients (96%) underwent biopsy at that time. Fifty-six patients (37%) were diagnosed with breast cancer, 44 (30%) with fibroadenoma, and 50 (33%) with other benign diagnoses. Among those with breast masses on US (n = 255), 149 patients (58%) underwent biopsy and 55 (22%) were diagnosed with cancer. As of November 2017, all patients ultimately diagnosed with cancer had had a biopsy at their initial visit. No patients who had been discharged or were receiving surveillance had been subsequently diagnosed with cancer. Conclusion Diagnostic breast US by general practitioners and nurses has been a useful tool for the evaluation of breast lesions at a rural Rwandan facility and has helped avoid biopsy for 42% of patients with breast masses on US. Clinical follow-up is ongoing to assess longer-term outcomes and examine cancer detection rates and loss-to-follow-up rates among patients not initially biopsied. AUTHORS' DISCLOSURES OF POTENTIAL CONFLICTS OF INTEREST The following represents disclosure information provided by authors of this manuscript. All relationships are considered compensated. Relationships are self-held unless noted. I = Immediate Family Member, Inst = My Institution. Relationships may not relate to the subject matter of this manuscript. For more information about ASCO's conflict of interest policy, please refer to www.asco.org/rwc or ascopubs.org/jco/site/ifc . Lydia E. Pace Stock or Other Ownership: Firefly Health Sughra Raza Honoraria: Fujifilm Medical Services Travel, Accommodations, Expenses: Fujifilm Medical Services

PURPOSE: Engaging primary care providers (PCPs) in BRCA1/2 testing and results disclosure would increase testing access. The BRCA Founder OutReach (BFOR) study is a prospective study of BRCA1/2 founder mutation screening among individuals of Ashkenazi Jewish descent that sought to involve participants' PCPs in results disclosure. We used quantitative and qualitative methods to evaluate PCPs' perspectives, knowledge, and experience disclosing results in BFOR. METHODS: Among PCPs nominated by BFOR participants to disclose BRCA1/2 results, we assessed the proportion agreeing to disclose. To examine PCP's perspectives, knowledge, and willingness to disclose results, we surveyed 501 nominated PCPs. To examine PCPs' experiences disclosing results in BFOR, we surveyed 101 PCPs and conducted 10 semi-structured interviews. RESULTS: In the BFOR study overall, PCPs agreed to disclose their patient's results 40.5% of the time. Two hundred thirty-four PCPs (46.7%) responded to the initial survey. Responding PCPs were more likely to agree to disclose patients' results than non-responders (57.3% vs. 28.6%, p<0.001). Among all respondents, most felt very (19.7%) or somewhat (39.1%) qualified to share results. Among PCPs declining to disclose, insufficient knowledge was the most common reason. In multivariable logistic regression, feeling qualified was the only variable significantly associated with agreeing to disclose results (OR 6.53, 95% CI 3.31, 12.88). In post-disclosure surveys (response rate=55%), PCPs reported largely positive experiences. Interview findings suggested that although PCPs valued the study-provided educational materials, they desired better integration of results and decision support into workflows. CONCLUSION: Barriers exist to incorporating BRCA1/2 testing into primary care. Most PCPs declined to disclose their patients' BFOR results, although survey respondents were motivated and had positive disclosure experiences. PCP training and integrated decision support could be beneficial.