params.put("PU", platformUnit);
params.put("CN", SEQUENCING_CENTER);
params.put("PL", PLATFORM);
if (RUN_START_DATE != null) {
final Iso8601Date date = new Iso8601Date(RUN_START_DATE);
params.put("DT", date.toString());
} else {
params.put("DT", null);
}
return params;