HD 19/12/16. --
Ungraded in Sherpa.  (Info, from Journal website: standard licence to publish will allow you to make the accepted manuscript of your article freely available after a 12-month embargo period) 12 MONTHS EMBARGO FOR ACCEPTED V. ENDS Jan 2017, requested (Gray), 28.4.17--MMM.  Received & added 5.5.17-MMM