protected List<T> readData(Reader reader) throws Exception{
        List<T> items= new ArrayList<T>();
        try{
            Iterable<CSVRecord> records = CSVFormat.APPLE.withDelimiter('|').withHeader(factory.header()).withFirstRecordAsHeader().parse(reader);
            for(CSVRecord record : records){
                patients.add(factory.instance(record));
            }
        } finally {
            reader.close();
        }
        return items;