Biometry
The required socio-demographic data as well as data on the surgical procedure will be assessed by chart review beforehand and will be included in the study documentation as source data. All other necessary data are determined and recorded by the investigator or observer during the intervention in real time. The questionnaires on teamwork and task load will be filled out by the care providers as soon as the ongoing procedures allow for. The principal investigator at each study site will be responsible for the timely documentation in the electronic case report form (eCRF) and the proper documentation and storage of source data according to applicable local laws.All data relevant to the trial will eventually be entered into an eCRF and stored in an electronic database provided by OpenClinica LLC (Waltham, MA, USA). Hosting of the database in accordance with German and EU laws will be ensured by Docs In Clouds Telecare GmbH (Aachen, Germany).Data collection forms can be requested from the authors.