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Sundram FX, Aw SE, Toh HJ, Chua ET.Sundram FX, et al. Among authors: toh hj.Ann Acad Med Singap. 1990 Mar;19(2):156-60.Ann Acad Med Singap. 1990.PMID: 2346288
Low JA, Toh HJ, Tan LLC, Chia JWK, Soek ATS.Low JA, et al. Among authors: toh hj.J Am Med Dir Assoc. 2020 Aug;21(8):1073-1078. doi: 10.1016/j.jamda.2020.04.014. Epub 2020 Jun 20.J Am Med Dir Assoc. 2020.PMID: 32576435