Dr. Martin reports having served as a consultant for and having received speakers’ honoraria from...
Please, formulate it for me in easier way. I don't fully understand the meaning.
Thanks in advance.

PS: This is an article from "The New England Journal of Medicine".
Dr. Martin reports having served as a consultant for and having
received speakers’ honoraria from Bristol-Myers Squibb and Aventis;
Dr. Mackey, having served as a consultant for and having received speakers’
honoraria from Aventis, AstraZeneca, Amgen, and
Roche and grant support from AstraZeneca, Roche, Amgen, and the
Canadian Breast Cancer Research Alliance...

Question

Dr. Martin reports having served as a consultant for and having received speakers’ honoraria from...
Please, formulate it for me in easier way. I don't fully understand the meaning.
Thanks in advance.

PS: This is an article from "The New England Journal of Medicine".
Dr. Martin reports having served as a consultant for and having
received speakers’ honoraria from Bristol-Myers Squibb and Aventis; 
Dr. Mackey, having served as a consultant for and having received speakers’ 
honoraria from Aventis, AstraZeneca, Amgen, and
Roche and grant support from AstraZeneca, Roche, Amgen, and the
Canadian Breast Cancer Research Alliance...

Answer

Dr... Says that she has been paid to advise and give speeches to these organisations...

Answer

Dr. Martin - let's call him "he"
Aventis, AstraZeneca, Amgen, and Roche - probably pharmaceutical companies. Let's call them .
He served as a consultant for 
He has received honoraria from 
honoraria = more than one honorarium, probably money, possibly, from context some sort of award.
.
He has been a consultant & received awards from

reports - means "says",
So we only have this "reports". We cannot be sure that it is true.
What were the awards/money for? "speaking" (about something complicated?). they were "speakers' honoraria".
He was a consultant. He served as a consultant.
Hope this helps.
:)