MIGHEAL fieldwork was conducted during 19 May 2016 until  28 July 2016 by Metron Analysis SA under the supervision of EKKE team.The achieved sample consisted of 1,332 individuals aged 15 or over, living in the main cities of Greece.Data were collected in face to face interviews (PAPI) according to the specifications of the 7th Round of European Social Survey (ESS). The pilot survey of the questionnaire was conducted from April 22 to April 24, 2016, with a sample of ten migrants and ten non-migrants, residents of Attica.  The survey was supplemented by a set of cognitive interviews.