Author Roles
(1) Research Project: A. Conception, B. Organization, C. Execution; (2) Statistical Analysis: A. Design, B. Execution; (3) Manuscript Preparation: A. Writing of the First Draft, B. Review and Critique.R.P.P.W.M.M.: 1A, 1B, 1C, 2A, 2B, 3AB.P.C.v.d.W.: 3B