Mean number of problems across the PPE-15 domains for each month of the program (pooled data across all 15 PPE-15 domains). Mean number of problems across the PPE-15 domains for each month of the program (pooled data across all 15 PPE-15 domains) Paul Baker et al. BMJ Qual Improv Report 2017;6:u212876.w5262 © 2017, Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/