If a person's name comes with post nominal letters, e.g., John Smith PhD or Mary Green MD, which of the following is the correct/better way of forming the possessive?

(A): John Smith PhD's student; Mary Green MD's clcinc

(B): student of John Smith PhD; clinic of Mary Green MD

To me, style (A) sounds unnatural. So which is recommended?

closed as off-topic by user9646, Solar Mike, Massimo Ortolano, Anyon, user3209815 Oct 1 '18 at 12:42

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You could go with:

Dr. Smith's student


Dr. Green's clinic

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