PT - JOURNAL ARTICLE AU - Lau, Edmund M. AU - Naeije, Robert TI - Provocative testing of the pulmonary circulation: advances and unresolved issues AID - 10.1183/13993003.00860-2016 DP - 2016 Jul 01 TA - European Respiratory Journal PG - 18--20 VI - 48 IP - 1 4099 - http://erj.ersjournals.com/content/48/1/18.short 4100 - http://erj.ersjournals.com/content/48/1/18.full SO - Eur Respir J2016 Jul 01; 48