Fig. 1From: Influence on study outcomes of an inpatient study by the behavior of the study staff (PINgPOng): study protocol for a randomized clinical trialSchedule of enrolment, interventions, and assessments according to SPIRIT figure. *Only visit 1. +Before blood draw. §Directly before and 15 min after CPT. $Directly before CPT. &Only Il-6Back to article page