Areas under the curve were as follows ( CIs in parentheses ) : cardiac troponin I ( cTnI ) Stratus CS @ ( @ to @ ) , cTnI Beckmann @ ( @ to @ ) , cTnI Siemens ultra @ ( @ to @ ) , cardiac troponin T high sensitivity @ ( @ to @ ) , HFABP @ @ ( @ to @ ) copeptin @ ( @ to @ ) .