This study is designed to collect long-term safety information on infliximab, from patients with COPD who participated in research studies using this drug. The primary COPD studies include C0168T54 (in the U.S.) and two small studies in Europe (EU0016 C0168X09 and EU0073 C0168X57). All patients who had at least one dose of study drug in those studies are being asked to participate in this long-term safety follow-up study which will provide important information about the study drug. The long-term effect of the study drug on new cancers and survival will be evaluated from data collected over a 5-year period which begins from each patient's last safety visit in the primary study. Data for this study will be collected at study entry and twice yearly thereafter up to a maximum of 5 years from each patient's last safety visit in the primary study. The last safety visit in the primary study is defined as the last visit for each subject during which adverse events (AEs)s are recorded in the primary study.Twice yearly, all participating study sites will be reminded to complete the electronic charts for each participating patient. At study entry, the following will be performed: (1) Medical history and physical examination, including ear, nose, and throat (ENT) examination performed by a qualified physician; (2) Chest x-ray(posterior and lateral), unless performed within 3 months prior to enrollment and (3) CT (computer imaging) scan of the chest (spiral preferred), unless performed within 6 months prior to enrollment. In addition, data will be collected at study entry on the use of commercial infliximab or any other anti-tumor necrosis factor (anti-TNF) agent subsequent to the last safety visit in the primary study. At each patient's subsequent visit, data will be collected by either direct contact with the patient (office visit or telephone call), review of patient's medical records, contact with the patient's primary care physician or oncologist. At the final visit (5 years from each patient's last safety visit in the primary study), the following will be performed: (1) Medical history and physical examination, including ENT examination performed by a qualified physician; (2) Chest x-ray, unless performed within the previous 3 months, and (3) CT scan of the chest (spiral preferred), unless performed within the previous 6 months.