Cancer caused by environmental factors such as smoking, radiation and toxic chemicals, not 'bad luck', study reveals _ Health News _ Lifestyle _ The Independent - 4shared에서 다운로드하세요. Cancer caused by environmental factors such as smoking, radiation and toxic chemicals, not 'bad luck', study reveals _ Health News _ Lifestyle _ The Independent(은)는 무료 파일 공유 서비스 4shared에서 호스팅됩니다.