Fifty-two sex - and age-matched patients at the first diagnosis of H. pylori infection were randomized @:@ into two different therapeutic schemes : ( @ ) standard LCA ( @ patients ) : lansoprazole @ mg bid , clarithromycin @ mg bid and amoxicillin @,@ mg bid for @ days with a common diet ; ( @ ) standard LCA plus a nickel free-diet ( NFD-LCA ) ( @ patients ) .