“…Six authors [31,39,41,45,49,50] did not mention toxicity and in the other 9 articles [37,38,40,42,[46][47][48]51,52] different scales or subjective evaluations were used. Percentage of ''serious" or grade P 3 toxicities ranged from 0% to 80% for acute [40,46,47,51,52] and 0-20% for late toxicities [37,38,40,42,[46][47][48]51] among cases treated with UFND strategy. Two authors compared grade P 3 toxicities among the groups treated with and without UFND: Allal et al [47] found no significant differences for acute (80% vs. 86%) and late toxicities (8% vs. 6%), whereas Al-Mamgani [51] reported significantly higher grade 3 acute toxicity in patients treated with Table 2 Description of studies with more than one arm.…”