tips MiR-181a: a potential biomarker of acute muscle wasting following elective high-risk cardiothoracic surgery April 7, 2015 Critical Care 2015, 19:147Â doi:10.1186/s13054-015-0853-5 Michael I Polkey, Mark JD Griffiths and Paul R Kemp contributed equally to this work. Published: 7 April 2015