Toggle navigation Screen-free 'til three Load unfinished survey Language: English 简体中文 Deutsch English 0% Caution: JavaScript execution is disabled in your browser or for this website. You may not be able to answer all questions in this survey. Please, verify your browser parameters. Language: 简体中文 Deutsch English Change the language default Screen-free 'til three Dear parents, dear educators, we would like to welcome you to this survey and look forward to your active participation. With kind regards, Dr. med. Silke Schwarz and Prof. Dr. med. David Martin Pediatricians, University of Witten/Herdecke This survey is anonymous. The record of your survey responses does not contain any identifying information about you, unless a specific survey question explicitly asked for it. If you used an identifying token to access this survey, please rest assured that this token will not be stored together with your responses. It is managed in a separate database and will only be updated to indicate whether you did (or did not) complete this survey. There is no way of matching identification tokens with survey responses. Next Load unfinished survey ×