title: Letter to the Editor: "Umbilical Pilonidal Sinus: A Report of Two Cases and Recent Update of Literature".
authors.affiliation: Department of General Surgery, Bahcesehir University, Medical School , Istanbul, Outside of the US, Turkey .
authors.forename: Mehmet
authors.initials: M
authors.lastname: Kaplan
authors.affiliation: Department of MP Research Program, Kemerburgaz University, Medical School , Istanbul, Outside of the US, Turkey .
authors.forename: Elif Tugce
authors.initials: ET
authors.lastname: Kaplan
authors.affiliation: Department of GAZU Research Program, Gaziantep University, Medical School , Gaziantep, Outside of the US, Turkey .
authors.forename: Tugba
authors.initials: T
authors.lastname: Kaplan
authors.affiliation: Family Physician, 25-Aralik Family Health Center, Gaziantep , Outside of the US, Turkey .
authors.forename: Fatma Cigdem
authors.initials: FC
authors.lastname: Kaplan