Applications of low-cost 3D printing in left atrial appendage closure using epicardial approaches – initial clinical experience - Litwinowicz, Radoslaw; Witowski, Jan; Sitkowski, Mateusz; Filip, Grzegorz; Bochenek, Maciej; Michalski, Michal; Banaszkiewicz, Krzysztof; Urbanczyk-Zawadzka, Malgorzata; Banys, Robert; Sobczynski, Robert; Kapelak, Boguslaw; Bartus, Krzysztof (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2018)