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The prospective data collection initiative on on small bowel, colorectal and anal cancer - a prospective observational cohort study.

The main objectives of this project are:- To start a prospective observational cohort study of patients who have been diagnosed with CRC, small bowel and anal cancer and follow them from time of diagnosis until death.- To prospectively collect data…

Longitudinal Leiden Orthopaedics Outcomes of OsteoArthritis Study

Given the above mentioned gaps in knowledge, the aim of this project is to1) Describe the midterm and long-term outcomes of (primary and revision) total hip, total knee and shoulder replacement surgery in terms of health status as a whole,…

The cost-effectiveness of contingency management compared to standard cognitive behavioral treatment for treating cannabis use disorder in youth: A randomized controlled trial

We aim to investigate in an RCT the (cost-)effectiveness of CM, compared with usual care CBT in the treatment of CUD in youths aged 16 to 22 years. Both outpatient treatments are provided for 12 weeks.PRIMARY STUDY QUESTION:1. What is the efficacy…