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Removing bias in cancer survival estimates by active follow-up and information on determinants of loss to follow-up : a study on ovarian cancer patients seen at Regional Cancer Centre, Trivandrum, India in 1989 to 1993

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Removing bias in cancer survival estimates by active follow-up and information on determinants of loss to follow-up : a study on ovarian cancer patients seen at Regional Cancer Centre, Trivandrum, India in 1989 to 1993

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