Integrating Spatial-Temporal Risk Factors for an Ambulance Allocation Strategy: A Case Study in BangkokPakinai Chaicharoenwut, Jarotwan Koiwanit, Pannapa Changpetch, Sirisuda Buatongkue and Chumpol YuangyaiMATEC Web Conf., 192 (2018) 01038DOI: https://doi.org/10.1051/matecconf/201819201038