The complex nature of both primary care settings as well as capturing patient harm in these settings may be explaining the knowledge gap. Some studies on medication and diagnostic errors have been identified. In Indonesia, a study identified ADEs in 226 out of 229 prescriptions in the outpatient setting, out of which 99.12% was due to prescription errors (incomplete prescription error the most common), 3.66% dispensing errors and 3.02% pharmaceutical errors (Perwitasari et al, 2010).