“…Furthermore, the Agency for Health Care Research and Quality reported in 2002 that the VHI met stringent criteria for reliability, validity and availability of normative data [10]. The VHI has been translated into many different languages [11,12,13,14,15,16,17], and it has been validated by assessing equivalence of the European translation of the questionnaire to German, French, Dutch, Italian, Portuguese, Belgian and Swedish [17]. The US VHI and the various European translations appear to be equivalent, suggesting that the results from the various published translations are comparable [17].…”