code: protected List<String> getCellLines(String explanation) {
  		int startPos = 0;
  		List<String> cellLines = new ArrayList<>();
  		for (int commaPos = 0; commaPos > -1;) {
  			commaPos = explanation.indexOf(",", startPos);
  			if (commaPos >= 0) {
                  String cellLine = (explanation.substring(startPos, commaPos).trim());
  				explanation = explanation.substring(commaPos + 1);
  				if (cellLine.length() > 0) {
  					cellLines.add(cellLine);
  				}
  			} else if (explanation.length() > 0) {
  				cellLines.add(explanation.trim());
  			}
  		}
  		return cellLines;
  	}
docs: This method splits the passed explanation comprising cell line
  information, puts into a list and returns the list.
  
  @param explanation
  String of cell lines
  @return {@link List}