- The cost of long term therapy for gastro-oesophageal reflux disease: a randomised trial comparing omeprazole and open antireflux surgery. Myrvold, H.E., Lundell, L., Miettinen, P., Pedersen, S.A., Liedman, B., Hatlebakk, J., Julkunen, R., Levander, K., Lamm, M., Mattson, C., Carlsson, J., Ståhlhammar, N.O. Gut (2001)