(1) Clinical Guidelines for the Manual Titration of Positive Airway Pressure in Patients with Obstructive Sleep Apnea, Positive Airway Pressure Titration Task Force of the American Academy of Sleep Medicine, Journal of Clinical Sleep Medicine, Vol.4, No.2, 2008
(2) Guimaraes KC, Drager LF, et al. Effects of oropharyngeal exercises on patients with moderate obstructive sleep apnea syndrome, Am J Respir Crit Care Med. 2009 May 15;179(10):962-6.
(3) Puhan MA, Suarez A, et al. Didgeridoo playing as alternative treatment for obstructive sleep apnoea syndrome: randomised controlled trial. BMJ. 2006 Feb 4;332(7536):266-70.