00441cam a22001698a 4500020001500000082001300015100001700028245004100045250001200086260004400098300001200142500002400154650002800178654002100206700002300227700002100250  a044306157204a616bBEC1 aBeck, Eric R00aTutorials in differential diagnosis   a4th ed.  aEdinburgh bChurchill Livingstonec2003  a250 p.   aPrevious ed.: 1992. 0aDiagnosis, Differential  aMedicine General1 aSouhami, Robert L.1 aHanna, Michael G