“…This work persisted with what others have found (e.g., Makdissi et al, 2010;Schneider, Meeuwisse, Kang, Schneider, & Emery, 2013;Weinstein et al, 2013), suggesting that headache remains a concerning indicator of concussion, holding that the symptom surfaces shortly thereafter (Stovner, Schrader, Mickevičiene, Surkiene, & Sand, 2009). Moreover, after Weinstein and colleagues' report, the authors searched the concussion literature concerning headaches, concluding that a "profound ongoing headache may be a more specific predictor [of concussion] than other subjective symptoms" (2013, p. 334).…”