Two Italian Twin Registers for Research in Human Biology and Sport Science

The Western Australian Register of Childhood Multiples: Effects of Questionnaire Design and Follow-up Protocol on Response Rates and Representativeness

“…Many twin registers have now been established world-wide (Boomsma et al, 2002a;Boomsma, 1998). They may collect information on twins of all ages (Skytthe et al, 2002;Stazi et al, 2002), restrict their data to specific age groups (Hayakawa et al, 2002;Kaprio & Koskenvuo, 2002;Spector & MacGregor, 2002;Spinath et al, 2002;Trouton et al, 2002), or be established to study defined populations (Casini et al, 2002;Goldberg et al, 2002;Page, 2002). In Australia, the Australian Twin Registry (ATR), established in the late 1970s, contains information on over 30,000 twin pairs (Hopper, 2002).…”