RegEx - Extracting Characters Between Specific Phrase

I need to extract just the measure units from blood test text I've got, i.e.. "K/UL","M/UL","%",etc. at the following text:

WBC                            4.27-11.40 k/uL                        3.64 (L)
RBC                            3.90-5.03 m/uL                         4.30
Hemoglobin                     10.6-13.4 g/dL                         13.0
Hematocrit                     32.2-39.8 %                            36.1
MCV                            74.4-87.6 fL                           84.0
MCH                            24.8-29.5 pG                           30.2 (H)
MCHC                           31.8-34.9 g/dL                         36.0 (H)
RDW-CV                         12.2-14.4 %                            13.2
Platelet Count                 150-400 k/uL                           175
MPV                            9.2-11.4 fL                            8.6 (L)
Neut%                          28.6-74.5 %                            43.1
Abs Neut (ANC)                 1.63-7.87 k/uL                         1.57 (L)
Lymph%                         15.5-57.8 %                            43.7
Abs Lymph                      0.97-4.28 k/uL                         1.59
Mono%                          4.2-12.3 %                             9.3
Abs Mono                       0.19-0.85 k/uL                         0.34
Eosin%                         0.0-4.7 %                              3.6
Abs Eosin                      0.00-0.52 k/uL                         0.13
Baso%                          0.0-0.7 %                              0.3
Abs Baso                       0.00-0.06 k/uL                         0.01

Which means I need to recognize '-'+number+' '+Unit to Extract

I tried to use Negative look behind expression (?<!-[0-9]?!([0-9]*[.])?[0-9]+ )(\D)+ , which means to match only non digits if there is a '-' char followed with a float number, but it yields zero matches.

Please note that I'm using SAS (i.e. Perl RegEx).