TY - BOOK AU - Kirwood,Betty R. AU - Stemme,Jonathan A.C. TI - Essential medical statistics SN - 9780865428713 U1 - 610.727 PY - 2003/// CY - Malden, Mass. PB - Blackwell Science KW - Medicine KW - Research KW - Statistical methods KW - Medical statistics N1 - Includes biblographical references & index ER -