Original article Safety and feasibility of percutaneous closure of patent foramen ovale without intra-procedural echocardiography in 825 patients J Stinimann DOI: https://doi.org/10.4414/smw.2008.12255 Publication Date: 04.10.2008 Swiss Med Wkly. 2008;138(39-40):567-572 This text is only available as PDF .