Latent Tuberculosis Infection

• Xinpu New Area Center of Disease Control — Zunyi, Guiyang, China
• Dafang Center for Disease Control and Prevention — Bijie, Guizhou, China
• Qixingguan Center for Disease Control and Prevention — Bijie, Guizhou, China
• Nayong Center for Disease Control and Prevention — Bijie, Guizhou, China

Not specified

• Blizard Institute, Queen Mary University London — London, United Kingdom

• Taichung Veterans General Hospital — Taichung, Taiwan

• Liujiang district Prevention and Control center — Liuzhou, Guangxi, China
• Liuzhou Center for Disease Control and Prevention — Liuzhou, Guangxi, China

• CHU de NICE — Nice, Alpes Maritimes, France

• The First Affiliated Hospital of Bengbu Medical University — Bengbu, Anhui, China
• Anhui Chest Hospital — Hefei, Anhui, China
• Guangzhou Municipal Hospital of Chest Medicine — Guangzhou, Guangdong, China
• The Third People's Hospital Of Shenzhen — Shenzhen, Guangdong, China

• University of California, San Francisco — San Francisco, California, United States
• Denver Public Health Department — Denver, Colorado, United States
• Washington DC Veterans Affairs Medical Center — Washington D.C., District of Columbia, United States
• Columbia University College of Physicians and Surgeons and New York City Department of Health — New York, United States

• Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention — Liuzhou, Guangxi, China

• Los Angeles Christian Health Centers (LACHC) — Los Angeles, California, United States
• Union Rescue Mission — Los Angeles, California, United States