title: Difficulties in panic studies.
authors.forename: Donald F
authors.initials: DF
authors.lastname: Klein
mesh_terms: D002245:Carbon Dioxide / Q000008:administration & dosage / Q000009:adverse effects; D003937:Diagnosis, Differential; D006801:Humans; D019344:Lactic Acid / Q000009:adverse effects; D016584:Panic Disorder / Q000175:diagnosis / Q000209:etiology / Q000523:psychology
chemical_list: D002245:Carbon Dioxide; D019344:Lactic Acid