The case of the six-gallon hat.
D001706:Biopsy; D019411:Clinical Laboratory Techniques; D003048:Coccidiosis / Q000175:diagnosis*; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D004502:Education, Medical, Continuing; D006689:Hodgkin Disease / Q000175:diagnosis*; D006801:Humans; D010817:Physician-Patient Relations