Variation in suspected cancer referral pathways in primary care: comparative analysis across the International Benchmarking Cancer Partnership by Lynch, C, Harrison, S, Emery, JD, Clelland, C, Dorman, L, Collins, C, Johansen, M-L, Lawrenson, R, Surgey, A, Weller, D, Jarbøl, DE, Balasubramaniam, K, Nicholson, BD