Fig. 1From: Development and validation of an objective assessment scale for chest tube insertion under ‘direct’ and ‘indirect’ ratingScoring form for the developed assessment scale for chest tube insertion based on OSATS according to Friedrich et al. 2017. Reference: Friedrich M, Bergdolt C, Haubruck P, Bruckner T, Kowalewski KF, Muller-Stich BP, Tanner MC, Nickel F: App-based serious gaming for training of chest tube insertion: study protocol for a randomized controlled trial. Trials 2017, 18(1):56Back to article page