The skin cancer prevention study: Design of a clinical trial of beta-carotene among persons at high risk for nonmelanoma skin cancer
Titel:
The skin cancer prevention study: Design of a clinical trial of beta-carotene among persons at high risk for nonmelanoma skin cancer
Auteur:
Robert Greenberg, E. Baron, John A. Stevens, Marguerite M. Stukel, Thérèse A. Mandel, Jack S. Spencer, Steven K. Elias, Peter M. Nicholas, Lowe Nierenberg, David N. Bayrd, Garrett Corwin Vance, J.