Erratum to: Morphometrical analysis of transbronchial cryobiopsies. Issue 1 (December 2016) - Griff, Sergej; Ammenwerth, Wim; Schönfeld, Nicolas; Bauer, Torsten; Mairinger, Thomas; Blum, Torsten-Gerriet; Kollmeier, Jens; Grüning, Wolfram