TY - STD TI - Edwardes MD: Sample Size Requirements for Case-Control Study Designs. BMC Medical Research Methodology. 2001, 1 (11): ID - ref1 ER - TY - STD TI - The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2288/2/16/prepub UR - http://www.biomedcentral.com/1471-2288/2/16/prepub ID - ref2 ER -