what is the name of the medical trial is associated with a medical trial health authority with medical trials a phase iii study to evaluate the safety and efficacy of ganciclovir (dihydroxypropoxymethyl guanine [dhpg]) treatment of symptomatic central nervous system (cns) congenital cytomegalovirus (cmv) infections.?
(AND medicine.medical_trial (JOIN medicine.medical_trial.health_authority (JOIN medicine.medical_trial_health_authority.medical_trials m.03zbbyd)))