Safety and Efficacy Study of Asfotase Alfa in Severely Affected Infants With Hypophosphatasia (HPP)

Alfred I. duPont Hospital for Children, Wilmington

Vanderbilt Children's Hospital, Nashville

St. Vincent Hospital, Green Bay

St. John's Hospital, Springfield

University of Nebraska Medical Center, Munroe-Meyer Institute, Omaha

Arkansas Children's Hospital, Little Rock

The University of Manitoba Health Sciences Centre, Winnipeg

Tawam-John Hopkins Hospital, Al Ain City

Royal Belfast Hospital for Sick Children, Belfast

Sheffield Children's Hospital, Sheffield