“…There is some evidence that the predominant users of depression support groups are consumers ( Houston et al, 2002 , Powell et al, 2003 , Salem et al, 1997 , Alexander et al, 2003 , Nimrod, 2012 ) who are primarily in their mid-20s to 40s ( Dosani et al, 2014 , Houston et al, 2002 , Nimrod, 2012 , Powell et al, 2003 ); there is mixed evidence regarding gender of users ( Dosani et al, 2014 , Fekete, 2002 , Houston et al, 2002 , Nimrod, 2012 , Powell et al, 2003 , Salem et al, 1997 , Takahashi et al, 2009 ). However as noted by Griffiths et al (2009b) , a limitation of most previous studies of public depression support groups is that they have been derived from surveys posted on ISGs or by inferring the users' status from posts.…”