Recurrent Laughter-Induced Syncope
The Neurologist 18:214-215, Gaitatzis, A. & Petzold, A., 2012
Laughing Headache: A Novel Type of Triggered Headache with Response to Divalproex Sodium
Headache 43:801-803, Levin,M. &Ward,T.N., 2003
Relationship between Orthostatic Dizziness and/or Giddiness, and Hypotension in Young Normal Females - a Survey of 301 Subjects
Nihon Jibiinkoka Gakkai Kaiho 98:52-59, Nozawa, I.,et al, 1995