[1] Weill Cornell Med Coll, 1300 York Ave, New York, NY 10021 USA
[2] Hosp Special Surg, 535 East 70th Steet, New York, NY 10021 USA
[3] Kings Coll London, London SE5 9RS, England
[4] Kings Coll Hosp London, London SE5 9RS, England
[5] Univ Magdeburg, Univ Pl 2, D-39106 Magdeburg, Germany
[6] Ctr Paulista Invest Clin, 342 Ipiranga, BR-04265000 Sao Paulo, SP, Brazil
[7] CEIM Invest Med, Laprida 1307, RA-1425 Buenos Aires, DF, Argentina
[8] Hong Kong Sanat & Hosp, 2 Village Rd, Happy Valley, Hong Kong, Peoples R China
[9] Seoul Natl Univ, Coll Med, 103 Daehak Ro, Seoul 03080, South Korea
[10] Univ Med & Pharm, Ctr Rheumat Dis, 37 Dionise Lupu St, Bucharest 020021, Romania
[11] Arthrit Consumer Experts, 210-1529 West 6th Ave, Vancouver, BC V6J 1R1, Canada
[12] Harris Poll, 155 Corp Woods, Rochester, NY 14623 USA
[13] Pfizer Inc, 235 East 42nd St, New York, NY 10017 USA
[14] Pfizer Inc, Calle Las Orquideas 585, Lima 15046, Peru
[15] Cabrillo Ctr Rheumat Dis, Suite 203,300 S Pierce St, San Diego, CA 92020 USA