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Submitted on: 11 March 2014.
Revised on: 03 July 2014.
Accepted on: 08 August 2014.
___________________BRITISH JOURNAL OF DERMATOLOGY
Submitted on: 11 March 2016.
Revised on: 02 May 2016.
Accepted on: 19 May 2016.
___________________BRITISH JOURNAL OF DERMATOLOGY