Heart Rate Responses to Autonomic Challenges in Obstructive Sleep Apnea Macey, Paul M. ; Kumar, Rajesh ; Woo, Mary A. ; Yan-Go, Frisca L. ; Harper, Ronald M. Abstract Publication: PLoS ONE Pub Date: October 2013 DOI: 10.1371/journal.pone.0076631 Bibcode: 2013PLoSO...876631M