Ras, M., Reitsma, J. B., Hoes, A. W., Six, A. J., & Poldervaart, J. M. (2017). Secondary analysis of frequency, circumstances and consequences of calculation errors of the HEART (history, ECG, age, risk factors and troponin) score at the emergency departments of nine hospitals in the Netherlands. BMJ Open.

Ras, Marten, Johannes B. Reitsma, Arno W. Hoes, Alfred Jacob Six, a Judith M. Poldervaart. "Secondary Analysis of Frequency, Circumstances and Consequences of Calculation Errors of the HEART (history, ECG, Age, Risk Factors and Troponin) Score At the Emergency Departments of Nine Hospitals in the Netherlands." BMJ Open 2017.

Ras, Marten, et al. "Secondary Analysis of Frequency, Circumstances and Consequences of Calculation Errors of the HEART (history, ECG, Age, Risk Factors and Troponin) Score At the Emergency Departments of Nine Hospitals in the Netherlands." BMJ Open 2017.