RNH stands for Registratie Huisartspraktijken. The RNH is an anonymized database, in which a limited set of personal data and relevant healthcare data is being stored. 21 General Practicioner offices containing about 65 General Practicioners, mainly from Southern-Limburg, are currently involved with the RNH. The network involves approximately 105.000 patients. MEMIC has been taking care of the controlling, processing en reporting of these data sets for the past 25 years.