RT Journal Article SR Electronic T1 The influence of patent foramen ovale on oxygen desaturation in obstructive sleep apnoea JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00035906 A1 M.C. Johansson A1 P. Eriksson A1 Y. Peker A1 J. Hedner A1 L. RĂ¥stam A1 U. Lindblad YR 2006 UL http://erj.ersjournals.com/content/early/2006/09/27/09031936.00035906.abstract AB