He used it in his pen name to honor his fathers wishes that he obtain a PhD.
Nobody knows, why don't you look it up on his website. Or borrow a biography about him from the nearest library. I'm sure you'll find out. Look in the table of contents. Good Luck!
Woman's doctor is called GYNECOLOGIST.
Anyone with a medical degree can be called a doctor.
the cyber people in doctor who, are called Cybermen.
the answer to that question is Doctor Who The next doctor
It is confirmed as being called "The Next Doctor"
the proposition Jose Rizal deserved to be called a doctor
When one doctor seeks advice from another doctor it is called a consultation.
A doctor that specialises in children is called a paediatrician. The doctor who specializes in diabetes is a nephrologist.
a nurse school doctor
doctor in cytology
a spine doctor.