The secret in a casual parenthesis.
Murphy-Greenwood
M A
MA
D006801:Humans; D008223:Lymphoma / Q000150:complications / Q000175:diagnosis*; D010610:Pharyngeal Neoplasms / Q000150:complications / Q000175:diagnosis*; D010817:Physician-Patient Relations; D012891:Sleep Apnea Syndromes / Q000209:etiology*