Fig. 1From: One-year follow-up of B vitamin and Iron status in patients with phenylketonuria provided tetrahydrobiopterin (BH4)Participant Flowchart for PKU Kuvan Study, from 2008 to 2009 Baseline Enrollment. *MF change indicates prescription at end of study as a fraction of the MF prescription at baseline. The five reported as “No formula” had all prescribed MF removed from their PKU diet by study endBack to article page