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Johnson NP, Farquhar CM, Crossley S, Yu Y, Van Peperstraten AM, Sprecher M, Suckling J.Johnson NP, et al. Among authors: farquhar cm.BJOG. 2004 Sep;111(9):950-9. doi: 10.1111/j.1471-0528.2004.00233.x.BJOG. 2004.PMID: 15327610Clinical Trial.
Busfield RA, Farquhar CM, Sowter MC, Lethaby A, Sprecher M, Yu Y, Sadler LC, Brown P, Johnson N.Busfield RA, et al. Among authors: farquhar cm.BJOG. 2006 Mar;113(3):257-63. doi: 10.1111/j.1471-0528.2006.00863.x.BJOG. 2006.PMID: 16487195Clinical Trial.
Brown PM, Farquhar CM, Lethaby A, Sadler LC, Johnson NP.Brown PM, et al. Among authors: farquhar cm.BJOG. 2006 Jul;113(7):797-803. doi: 10.1111/j.1471-0528.2006.00944.x.BJOG. 2006.PMID: 16827763Clinical Trial.
Johnson N, Busfield R, Sadler L, Lethaby A, Farquhar C.Johnson N, et al.BJOG. 2001 Jul;108(7):773-4. doi: 10.1111/j.1471-0528.2001.00163.x.BJOG. 2001.PMID: 11467716No abstract available.
Johnson NP, Proctor M, Farquhar CM.Johnson NP, et al. Among authors: farquhar cm.Hum Reprod. 2003 May;18(5):947-54.Hum Reprod. 2003.PMID: 12721167Review.