00274nam a2200097Ia 4500008004100000040001100041245002900052250001000081260007600091300000900167251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aMedical Subject Headings  aED. 2  cJanuary, 1963bU. S. Department of Health Education, and WelfareaU.S.A  bV. 4