“…Although initially the response rate of 37% was thought to be low, it compared favourably to other studies (McSherry, 1995;Clifford and Murray, 2001;Kuuppelomäki and Tuomi, 2003;Hicks, 1995Denker, 1995. It is important however, to consider the response rate, as this may not only affect how the information is used but also how future studies are undertaken.…”