[1] PNG Inst Med Res, Madang, Papua N Guinea
[2] Case Western Reserve Univ, Cleveland, OH 44106 USA
[3] PNG Inst Med Res, Cleveland, OH USA
[4] Bogia Dist Hlth Adm, Bogia, Papua N Guinea
[5] PNG Natl Dept Hlth, Port Moresby, Papua N Guinea
[6] WHO, PNG, Port Moresby, Papua N Guinea
[7] PNG Inst Med Res, Goroka, Papua N Guinea
[8] Washington Univ, St Louis, MO USA
[9] Burnet Inst, Melbourne, Vic, Australia
[10] PNG Inst Med Res, Melbourne, Vic, Australia
[11] Walter & Eliza Hall Inst Med Res, Melbourne, Vic, Australia