Global private equity firm The Riverside Company has agreed to sell Hungary-based hematology analyzer systems manufacturer Diatron Group to Germany-based clinical diagnostics and biotechnology company STRATEC Biomedical. Riverside originally invested in Diatron in 2005. Diatron develops, manufactures and markets compact hematology analyzers for the human medical and veterinary markets. Financial details of the transaction, which is expected to close by the end of March 2016, were not disclosed.