title: Author's reply to the letter of Doll et al.
authors: Surgery Unit, Città di Bra Clinic, Strada Montenero 1, 12042, Bra, CN, Italy. diego.segre@gmail.com.
authors: D
authors: D
authors: Segre
authors: Department of General Surgery, Degli Infermi Hospital, Biella, Italy.
authors: M
authors: M
authors: Pozzo
authors: Department of General Surgery, Degli Infermi Hospital, Biella, Italy.
authors: R
authors: R
authors: Perinotti
authors: Proctology Unit, University Hospital, Geneva, Switzerland.
authors: B
authors: B
authors: Roche
mesh_terms: D003107:Colorectal Surgery / Q000592:standards*; D013505:Digestive System Surgical Procedures / Q000379:methods*; D019468:Disease Management; D006801:Humans; D010864:Pilonidal Sinus / Q000628:therapy*