Update README.md

README.md

@@ -13,4 +13,4 @@ GenECG is divided into the following subsets:
 The original PTB-XL metadata can be found in the following CSV file: https://physionet.org/content/ptb-xl/1.0.3/ptbxl_database.csv
 Images in the GenECG dataset have the same ecg_id as the PTB-XL dataset with the addition of _hr_1R to the ECG ID. For example, ECG 02000_hr_1R.png from GenECG corresponds to 02000_hr.dat in PTB-XL. 
 
-For more information about the creation of GenECG, please refer to the following publication: DOI: XXX
+For more information about the creation of GenECG, please refer to the following publication: DOI: https://doi.org/bmjhci-2024-101335