Article History
Received: 4 February 2019
Accepted: 19 June 2019
First Online: 21 August 2019
Compliance with ethical standards
: The retrospective cohort study was approved by our institutional review board with waiver of informed consent.
: Meng Ai Png, P. Chandra Mohan, Choong Yin Howe and Tet Sen Howe declare that they have no conflict of interest.Joyce S.B. Koh has received Overseas conference sponsor from Amgen Dec 2017 and Chairperson fee from Amgen Nov 2018. Amgen produces and markets Denosumab.