A Study of Amivantamab in Participants With Previously Treated Advanced or Metastatic Gastric or Esophageal Cancer

National Cancer Center Hospital, Chūōku

National Cancer Center Hospital East, Kashiwa

Saitama Cancer center, Kitaadachi-gun

Niigata Cancer Center Hospital, Niigata

Hokkaido University Hospital, Sapporo

Tohoku University Hospital, Sendai

Osaka University Hospital, Suita-shi

Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo

The Cancer Institute Hospital of JFCR, Tokyo

Yokohama City University Medical Center, Yokohama