TY - BOOK AU - Hulley, Stephen B. [et...al] TI - Designing Clinical Research: an epidemiologic approach SN - 0781722187 U1 - WA 950 PY - 2001/// CY - Philadelphia PB - Lippincott Williams & Wilkins KW - Clinical trials KW - Research methods N1 - Includes bibliographical references and index UR - http://www.loc.gov/catdir/enhancements/fy0711/00042418-d.html ER -