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"Variable Name","Variable ID","Variable Description",Version,"dbGaP Mapping" PX020501_Child_Head_Circumference_1,PX020501010000,"Child Head Circumference measured in centimeter, first measurement",,https://www.phenxtoolkit.org/protocols/view/20501 PX020501_Child_Head_Circumference_2,PX020501020000,"Child Head Circumference measured in centimeter, second measurement",,https://www.phenxtoolkit.org/protocols/view/20501 PX020501_Child_Head_Circumference_3,PX020501030000,"Child Head Circumference measured in centimeter, third measurement",,https://www.phenxtoolkit.org/protocols/view/20501 PX020501_Child_Head_Circumference_Average,PX020501040000,"Child Head Circumference measured in centimeter, average",,https://www.phenxtoolkit.org/protocols/view/20501