| co-oncology.com | Current Opinion in Oncology |
| co-obgyn.com | Current Opinion in Obstetrics and Gynecology |
| co-neurology.com | Current Opinion in Neurology |
| co-lipidology.com | Current Opinion in Lipidology |
| co-infectiousdiseases.com | Current Opinion in Infectious Diseases |
| co-hematology.com | Current Opinion in Hematology |
| co-gastroenterology.com | Current Opinion in Gastroenterology |
| co-endocrinology.com | Current Opinion in Endocrinology and Diabetes |
| co-cardiology.com | Current Opinion in Cardiology |
| co-pediatrics.com | Current Opinion in Pediatrics |
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