%0 Journal Article %T Regular repetitive voluntary blood donors: What¡äre their characteristics ? %A Wiwanitkit Viroj %J Asian Journal of Transfusion Science %D 2011 %I Medknow Publications %U http://www.ajts.org/article.asp?issn=0973-6247;year=2011;volume=5;issue=2;spage=184;epage=185;aulast=Wiwanitkit