Diphtheria

• Vaccine Evaluation Center — Vancouver, British Columbia, Canada
• Canadian Center for Vaccinology — Halifax, Nova Scotia, Canada
• The Ottawa Hospital Research Institute — Ottawa, Ontario, Canada
• Centre hospitalier universitaire Ste-Justine — Montreal, Quebec, Canada

• Klinik Kesihatan Bangi — Bandar Baru Bangi, Selangor, Malaysia
• Klinik Kesihatan Batu 9 — Cheras, Selangor, Malaysia
• Klinik Kesihatan Balakong — Cheras, Selangor, Malaysia
• Klinik Kesihatan Kajang — Kajang, Selangor, Malaysia

• Liangyuan District Center for Disease Control and Prevention, Shangqiu City — Shangqiu, Henan, China

• Jingsu Provincial Centre of Disease Control and Prevention — Nanjing, Jiangsu, China

• Women and Infants Hospital — Providence, Rhode Island, United States

• Dazhu Center for Disease Prevention and Control — Dazhou, Sichuan, China
• Cuiping Center for Disease Prevention and Control — Yibin, Sichuan, China
• Xingwen Center for Disease Prevention and Control — Yibin, Sichuan, China

• Fukui Aiiku Hospital — Fukui-shi, Fukui, Japan
• Oda Children's Allergy Clinic — Fukuoka, Japan
• Morooka Chirdren's Chikushi-dori Clinic — Fukuoka, Japan
• Shindo children's clinic — Fukuoka, Japan

Not specified

• Department of Pediatrics, Faculty of Medicine, Chiang Mai University — Chiang Mai, Thailand

Not specified