Very Early Passive Cycling Exercise in Mechanically Ventilated Critically Ill Patients: Physiological and Safety Aspects - A Case Series - Pires-Neto, Ruy Camargo; Kawaguchi, Yurika Maria Fogaça; Hirota, Adriana Sayuri; Fu, Carolina; Tanaka, Clarice; Caruso, Pedro; Park, Marcelo; Carvalho, Carlos Roberto Ribeiro (PLOS ONE, 2013)