title: Editorial comments (B): extracellular cyclic nucleotides.
mesh_terms: D019411:Clinical Laboratory Techniques; D000242:Cyclic AMP / Q000097:blood*; D006801:Humans; D007674:Kidney Diseases / Q000175:diagnosis; D011547:Pseudohypoparathyroidism / Q000175:diagnosis; D011556:Pseudopseudohypoparathyroidism / Q000175:diagnosis; D011863:Radioimmunoassay / Q000379:methods
chemical_list: D000242:Cyclic AMP