RT Journal Article SR Electronic T1 Influence of pre-analytic conditions on the rate of indeterminate T-SPOTĀ®.TB tests JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 221 OP 222 DO 10.1183/09031936.00179310 VO 38 IS 1 A1 A. Zellweger A1 J-P. Zellweger YR 2011 UL http://erj.ersjournals.com/content/38/1/221.abstract AB