Postherpetic Neuralgia

• Beijing Tiantan Hospital — Beijing, Beijing Municipality, China

• Kamezawa Clinic — Aichi, Japan
• Kimura Clinic — Aichi, Japan
• Fukuoka Tokushukai Hospital — Fukuoka, Japan
• Southern Tohoku General Hospital — Fukushima, Japan

• ICSMaugeri Spa — Pavia, Italy

• Lexicon Investigational Site — Scottsdale, Arizona, United States
• Lexicon Investigational Site — Tucson, Arizona, United States
• Lexicon Investigational Site — Greenbrae, California, United States
• Lexicon Investigational Site — Brandon, Florida, United States

• Marwa Mahmoud Rady — Asyut, Egypt

• Huai'an Hospital of Traditional Chinese Medicine — Huai'an, Jiangsu, China
• Lianyungang Hospital of Traditional Chinese Medicine — Lianyungang, Jiangsu, China
• Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine — Nanjing, Jiangsu, China
• Jiangsu Province Hospital of Chinese Medicine — Nanjing, Jiangsu, China

• Sydney, New South Wales, Australia

Not specified

• Beijing Tiantan Hospital — Beijing, Beijing Municipality, China

• PARC Clinical Research, Royal Adelaide Hospital — Adelaide, Australia
• PARATUS Clinical Research Brisbane — Brisbane, Australia
• PARATUS Clinical Research Canberra — Canberra, Australia
• Genesis Research Services — Sydney, Australia