XXXXXX of XXXX
XXXX XXXX XXXXXXX study is biased. Using XXXXXX XXXXXXX alone as XXX only XXXX XXX developing XXXXXXXXXX cancer will XXXX misguided XXXXXXXX. That XXXXX mean XXXX only XXXXXXXX and inheritance XX considered. However, environmental influences also XXXX a great contribution and need to XX considered. Such environmental risks XXXXXXX: age, XXXXXX, XXXX XXX prior exposure XX XXXXXXXXXX in the abdominal region. XXXXXXXXXXXX, XXX researcher XXXXX XX XXXXXXXX XXXXXXXXX risks XXXXXXXXXX XXXX occupation, XXXXXXXX, XXXXXXX and alcoholism. Moreover, the XXXXXX history sources may not be reliable. It XX XXXXXX that in XXXX families pancreatic XXXXXX has occurred but it was XXX XXXXXXXXX. XXX XXXXXXXX XX XXXX; XXXXXX with XXXXXX history of pancreatic XXXXXX do XXX necessarily develop it. XXXXXXX, XXX two groups XXXXXX XXXX same number XX tests using both XXXXXXX XXXXXXXXXX because the study targets to XXXXXXXXX the XXXXXXXX of XXX new XXXXXXXXX XX XXXXXXXXX XXX XXXXXXXXXX XXXXXX.