Latin America-focused growth-stage private equity fund manager LIV Capital and Singaporean sovereign wealth fund Temasek Holdings have acquired a 32 percent stake in Grupo Diagnóstico Proa, a Mexico-based operator of clinical diagnostic laboratories. The company, which operates 275 branches across Mexico under the Chopo brand, intends to use the funding to expand its domestic operations. Financial details of the transaction, which is subject to regulatory approval, were not disclosed.