7A04735A-FF6F-44E0-A09A-89DBA5CC930BHub in Trials Methodology Research (MRC Biostatistics Unit, Cambridge)Research GrantMC_EX_G0800860C008C651-F5B0-4859-A334-5F574AB6B57CMRCSUPPLEMENTARY_UNIT_AWARDS1773192B4675511-4005-46BE-90D7-3D78949F8FBEThe Skillings-Mack test (Friedman test when there are missing data).The Stata journal0359456468bd763a3fd937b2020b27d9Chatfield M2009-01-0119829764http://ukpmc.ac.uk/abstract/MED/198297641536-867Xhttp://europepmc.org/abstract/MED/1982976492Journal Article/Reviewr4XjLVYdQ2h