title: Stickiness of respondent-driven sampling recruitment chains.
authors.affiliation: Department of Sociology, Duke University, Box 90088, Durham, NC 27708-0088, USA ( jcf26@duke.edu ).
authors.forename: Jacob C
authors.initials: JC
authors.lastname: Fisher
authors.affiliation: Sanford School of Public Policy & Duke Global Health Institute, Duke Population Research Institute, Duke University, Box 90312, Durham, NC 27708, USA.
authors.forename: M Giovanna
authors.initials: MG
authors.lastname: Merli