W: Hello, Doctor.

D: Well, What seems to be the trouble, Mr. Williams?

W: It's nothing serious actually, doctor. It’s … Well, I get tired very easily recently, and I often doze off during meetings, office hours and sometimes even while I'm dining.

D: How long has this been going on?

W: About two months. I didn't pay much attention to it in the beginning, but you see, I got fired this morning. I dozed off while we were having an important meeting, right in front of the boss. I was very embarrassed.

D: How was your appetite?

W: Pretty good, I'd say.

D: You haven't lost any weight, have you?

W: No, doctor. I've actually put on two pounds.

D: Unbotton your shirt, please.

W: Well, doctor?

D: You'll have to have some laboratory examinatios to know for sure.

W: What examinations?

D: A blood test and uring test. You can come back next week, say 4 pm to see the results.