The members of the study team would like to thank all those encountered during the visits in Morocco and Saudi Arabia for their warm welcome and oneness, and for the information and the documents made available. Their thanks also go to the WHO offices in Morocco and in Saudi Arabia. The preparation and organization of the mission allowed the team to gather a wealth of information.

A special word of thanks for Dr. El-Fatik El-Samani, the WHO Representative in Riyadh, Saudi Arabia, for his professional assistance and his personal attention for the members of the study team. We will remember the efficiency and the assistance of the executive secretariat of the GCC in the person of Prof. Mustafa Abo Safe and Prof. Mohamed Ahmed Ali.

The study visit was made possible thanks to the support of the WHO Regional Office for Africa and the Drug Action Programme in the WHO Headquarters in Geneva.