Utility of a Medical Alert Protection System compared to telephone follow-up only for home-alone elderly presenting to the ED — A randomized controlled trial von Ong, Nicholas Wei Rong, Ho, Andrew Fu Wah, Chakraborty, Bibhas, Fook-Chong, Stephanie, Yogeswary, Pasupathi, Lian, Sherman, Xin, Xiaohui, Poh, Juliana, Chiew, Kelvin Koon Yeow, ONG, Marcus Eng Hock

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