Certainty time of death of the people that declared death is an important content in death declaration system and has important meanings in law,different legislativestyle exists to this in various countries,so it is necessary to discuss it,ourcountry should confirm the legal missing time expiration for concrete death date as the people that declared death.

Study on relationship between ambient PM_( 10),PM_(2.5) pollution and daily mortality in a district in Shanghai;

Logistic regression analysis for high risk factors of early death in acute leukemia;

Analysis of early death reason in patients with acute promyelocytic leukemia;

Objectives The study was designed to discover the correlative factors and main reason of early death after cervical spinal cord injury, to find the issue during early treating and curing, to improve the treating measure and to reduce the early mortality.