By Choy C.M.Y.   Tam W.H.   Ng P.C.   in British Journal of Obstetrics and Gynaecology

ISSN:0306-5456|108|12|1298-1299

Elsevier‎(2001)‎

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By Hon K.L.E.   Kam W.Y.C.   Lam M.C.A.   Leung T.F.   Ng P.C.   in Quality of Life Research

ISSN:0962-9343|15|10|1551-1558

Springer Publishing Company ‎(2006)‎

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By Durai R.   Ng P. C. H.   Uzkalnis A.   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|32|1|96-98

Informa Healthcare‎(2012)‎

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By Rogers C.D.F.   Chapman D.N.   Wan F.   Ng P.C.F.   Smith S.   in Tunneling and Underground Space Technology

ISSN:0886-7798|17|1|99-113

Elsevier‎(2002)‎

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