http://orcid.org/0000-0003-1083-1062Matthew Hollings1, http://orcid.org/0000-0002-2588-0425Yorgi Mavros1, http://orcid.org/0000-0003-4383-1712Jonathan Freeston1, http://orcid.org/0000-0002-1897-8707Maria Fiatarone Singh1,2 1Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia 2Hebrew SeniorLife, Harvard Medical School, Boston, Massachusetts, USA Correspondence to Dr Matthew Hollings; matthew.hollings{at}sydney.edu.au Abstract Objectives The efficacy of...