RT Article T1 A population based analysis of the implementation of pediatric facemasks in girls youth lacrosse JF International journal of pediatric otorhinolaryngology VO 93 SP 141 OP 144 A1 Walls, Andrew F. 1928-2021 A2 Waldman, Erik A2 Harley, Earl A2 Aaronson, Nicole A2 Kasle, David LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/191265623X DO 10.1016/j.ijporl.2016.12.040