“…References of full text papers were also reviewed by snowball method, resulting an additional five hits. The 32 potentially relevant full text papers contained 15 articles (Brennan et al, 2004;Kobelt and Kasteng, 2009;Orlewska et al, 2011;Balanescu and Wiland, 2013;Laki et al, 2013;Pavelka et al, 2013;Peńtek et al, 2014;Putrik et al, 2014b;Gulacsi et al, 2015;Gulacsi et al, 2017;Nikiphorou et al, 2017;Codreanu et al, 2018;Kotulska et al, 2018;Batko et al, 2019) mentioning at least one barrier. Full extraction of these papers to identify potential additional access barriers confirmed the completeness of the draft interview guide.…”