TY  - BOOK
AU  - Sillakivi,Toomas
TI  - Perforated peptic ulcer in Estonia: Epidemiology, risk factors and relations with helicobacter pylori 
PY  - 2003///
CY  - Tartu
PB  - Univ. Press
KW  - Medicine
KW  - Internal medicine
KW  - Gastric deseases
KW  - Helicobacter pylori
KW  - H
N1  - Includes bibliogr. references
ER  -