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Ricin - Wikipedia
Ricinus - Wikipedia
CDC | Facts About Ricin
Ricin poisoning - Mayo Clinic
CDC | Questions and Answers About Ricin
Ricin Poisoning: Causes, Symptoms, Next Steps - Healthline
Castor-oil plant | Description, Uses, & Ricin | Britannica
Ricin: Biotoxin | NIOSH | CDC
CDC Ricin | Background Information for Clinicians
Ricin | Symptoms, Treatment & Prevention | Britannica