Table 2.

Responses from Web-based Survey: Laboratories Currently Measuring SUAC (n=15).

Question	Yes	No	N/A
a. Do you report tyrosine and SUAC levels for Tyrosinemia Type I?	10	5	0
b. Do you report SUAC levels alone for Tyrosinemia Type I?	7	8	0
c. Do you report tyrosine levels alone for Tyrosinemia Type I?	1	14	0
d. Do you perform SUAC analysis only in response to an elevated tyrosine? (i.e. SUAC analysis is only performed as a second-tier test)	1	14	0
e. Do you have cut offs for tyrosine based on birth weight?	1	13	1
f. Do you have cut offs for tyrosine based on gestational age?	0	14	1
g. Were budgetary restrictions an obstacle to SUAC implementation in your laboratory?	2	10	3
h. Were technical resources or personnel issues an obstacle to SUAC implementation in your laboratory? (e.g. were additional staff or instruments required for testing?)	3	11	1