Lewis, K., Lewis, K. E., Seale, L., Bartle, I. E., Watkins, A. J., & Ebden, P. (2004). Early Predictors of CPAP Use for the Treatment of Obstructive Sleep Apnea. Sleep, 27(1), pp. 134-138. doi:10.1093/sleep/27.1.134

Lewis, Keir, Keir E. Lewis, Lisa Seale, Iona E. Bartle, Alan J. Watkins, and Philip Ebden. "Early Predictors of CPAP Use for the Treatment of Obstructive Sleep Apnea." Sleep 27, no. 1 (2004): 134-138.

Lewis, Keir, et al. "Early Predictors of CPAP Use for the Treatment of Obstructive Sleep Apnea." Sleep 27.1 (2004): 134-138.