English to Arabic Medical General / Conversation / Greetings / Letters a letter by an organization to a client

The National Children's Study is led by the following consortium of Federal agencies:
U.S. Department of Health and Human Services / .... etc.

Dear all,

What would be the best translation for the phrase into English?

I have translated it as follows:

الدراسة الوطنية للأطفال يترأسها اتحاد الوكالات الاتحادية التالية

Please, if anyone has a better translation, this would be much appreciated. I'll be grateful for any explanation.

Many thanks.