00326nam a22001457a 4500003000400000020001800004082001400022100003300036245004900069250000900118260001900127300000800146650001300154653001300167SGT  a9780702070273  a610bD18R  aRalston, Stuart H..[et. al.]  aDavidson's Principles & Practice of Medicine  a23rd  bElsevierc2018  a417  aMedicine  aMedicine