Sugar-protein connectivity impacts on the immunogenicity of site-selective salmonella O-antigen glycoconjugate vaccines by Stefanetti, G, Hu, Q, Usera, A, Robinson, Z, Allan, M, Singh, A, Imase, H, Cobb, J, Zhai, H, Quinn, D, Lei, M, Saul, A, Adamo, R, MacLennan, C, Micoli, F