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The sphincters separating different sections of the gastrointestinal tract depend on precisely balanced nitric oxide levels for proper function
Pathophysiology of Secondary Polycythemia Secondary polycythemia (D75.1) reflects an appropriate physiological response to chronic hypoxia (COPD, OSA, cyanotic heart disease, high altitude) or inappropriate EPO overproduction (renal cell carcinoma, hepatocellular carcinoma, cerebellar hemangioblastoma)
Reporting Summary Further information on experimental design is available in the Nature Research Reporting Summary linked to this article
From GLP-1s to Insulin: What to Know About Peptides Peptides promise health benefits, but do they actually work
