de Vries, G. E., Hoekema, A., Doff, M. H., Kerstjens, H. A., Meijer, P. M., van der Hoeven, J. H., & Wijkstra, P. J. (2015). Usage of Positional Therapy in Adults with Obstructive Sleep Apnea. J Clin Sleep Med.

de Vries, Grietje E., Aarnoud Hoekema, Michiel H.J Doff, Huib A.M Kerstjens, Petra M. Meijer, Johannes H. van der Hoeven, and Peter J. Wijkstra. "Usage of Positional Therapy in Adults With Obstructive Sleep Apnea." J Clin Sleep Med 2015.

de Vries, Grietje E., et al. "Usage of Positional Therapy in Adults With Obstructive Sleep Apnea." J Clin Sleep Med 2015.