docs: def extractSeparators(self, hl7dict, msg):
          """ Read from the MSH (Message Header) the separators used to separate the pieces
          of data
          Ex: In the message
          MSH|^~\&|OF|Chemistry|ORT||200309060825||ORU^R01^ORU_R01|msgOF105|T|2.5|123||||USA||EN
  
          The values separator are ^~\&|
  
          See HL7 Chapter 2
  
          """
          assert msg[:self.segment_len] == self.header_segment, \
              "Message MUST start with the %s segment : Here %s" % (self.header_segment, msg[:self.segment_len])
          hl7dict.separators = msg[self.segment_len:self.segment_len+self.separator_count]