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  Indian J Med Microbiol
 

Figure 1: Willem Einthovenfs electrocardiograph (weight ~ 2,75,000 grams) and Wellysis S-Patch Cardio (weight ~ 11 grams) lightweight real-time ambulatory electrocardiograph

Figure 1: Willem Einthovenfs electrocardiograph (weight ~ 2,75,000 grams) and Wellysis S-Patch Cardio (weight ~ 11 grams) lightweight real-time ambulatory electrocardiograph