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. 1998 Jan-Feb;5(1):41–51. doi: 10.1136/jamia.1998.0050041

Finally, the algorithm examines the list for symmetric matches to suggest redundant Meta concepts:

C0010762 Cytochrome P-450 and C0111822 Cytochrome P-450 Monooxygenase
C0022658 Kidney Diseases and C0221739 Renal Disorder
C0152100 Gouty Nephropathy and C0238145 Gout, Renal Disease
Note, however, that while C0022658 Kidney Diseases matches C0238145 Gout, Renal Disease, the reverse is not true, so the two concepts are not mutually inclusive and are not proposed as possible redundancies.