Aarst, M. van

patient trial recruitment outcome research patient recruitment shoulder intervention study practice assessment preference injection randomised trial shoulder trial treatment result observer outcome assessment m van aarst outcome measures randomised practitioner number patient preferences measure physiotherapy success windt reason subgroup analyses research centre researcher koes bw selection criteria influence procedure physician paper subgroup effect m b heemskerk care settings bouter lm corticosteroid injections shoulder pain criteria examination physician orientation profile difficulty participation disorder 120 patients trial procedures shoulder disorders surgery hours success rate pract month research assistant injection therapy selection centre participant physiotherapist aarst netherland range journal method medicine bouter exclusion diagnosis follow-up examination objective follow-up objective assessment office hours data collection