Grabowski J, Oyetunji TA, Goldin AB, Baird R, Gosain A, Lal DR, Kawaguchi A, Downard C, Sola JE, Arthur LG, Shelton J, Diefenbach KA, Kelley-Quon LI, Williams RF, Ricca RL, Dasgupta R, St Peter SD, S?mme S, Guner YS, Jancelewicz T. The management of pilonidal disease: A systematic review. J Pediatr Surg. 2019 Nov; 54(11):2210-2221.