Goodman Barbara E, Eisenhart Margaret, DeHaan Robert L, Kemm Robert E, Rodenbaugh David W, Pelaez Nancy
Sanford School of Medicine, University of South Dakota, Vermillion, South Dakota 57069, USA.
Adv Physiol Educ. 2007 Dec;31(4):374-6. doi: 10.1152/advan.00056.2007.