Fig. 2From: The feasibility of a crossover, randomized controlled trial design to assess the effect of probiotics and prebiotics on health of elite Swiss para-athletes: a study protocolSummary of study design. Participants are randomized to either probiotic (Bactosan pro-FOS) or prebiotic (oat bran), both taken once a day for 4 weeks (T1), followed by a washout period of 4 weeks (T2) and cross-over to the other intervention for another 4 weeks (T3)Back to article page