CAUSES OF BILIARY TRACT CANCER ARE
UNKNOWN. THIS ETIOLOGIC CASE-CONTR STUDY IS THE FIRST
POPULATION-BASED INVESTIGATION TO EVALUATE POTENTIA RISK FACTORS
FOR THIS DISEASE. KNOWLEDGE GAINED WILL BE USED TO CHARACTERIZE
INDIVIDUALS AT HIGH RISK AND TO DIRECT FUTURE RESEARCH.
On behalf of this Federal agency, I certify that
the collection of information encompassed by this request complies
with 5 CFR 1320.9 and the related provisions of 5 CFR
1320.8(b)(3).
The following is a summary of the topics, regarding
the proposed collection of information, that the certification
covers:
(i) Why the information is being collected;
(ii) Use of information;
(iii) Burden estimate;
(iv) Nature of response (voluntary, required for a
benefit, or mandatory);
(v) Nature and extent of confidentiality; and
(vi) Need to display currently valid OMB control
number;
If you are unable to certify compliance with any of
these provisions, identify the item by leaving the box unchecked
and explain the reason in the Supporting Statement.