nested case-control study

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Telomere Length and Risk of Hepatocellular Carcinoma: A Nested Case–control Study in Taiwan Cancer Screening Program Cohort
HUI ZENG, HUI-CHEN WU, QIAO WANG, HWAI-I YANG, CHIEN-JEN CHEN, REGINA M. SANTELLA and JING SHEN

Anticancer Research February 2017, 37 (2) 637-644;
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25-Hydroxyvitamin D and Breast Cancer, Colorectal Cancer, and Colorectal Adenomas: Case–Control versus Nested Case–Control Studies
WILLIAM B. GRANT

Anticancer Research February 2015, 35 (2) 1153-1160;