Well, I tried my own code:

#!/usr/bin/perl
use strict;
use warnings;

my @bands;

while (<DATA>) {
    chomp;
    my @elements = split(' ',$_);
    foreach my $element (@elements) {
        next unless ($element =~ /[pq]/i);
        next unless ($element =~ /[0-9]/);
        # put them into an array just in case you
        # want to do something other than print them
        push @bands, $element;
        print $element . "\n";
    }
}

__DATA__
Whole-genome scan studies recently identified a locus on 
Xq27-q28 Xq11-q12 22q12.1 1q42.2-q43 19q 17p11 1q25 13q12.3 
11p11.2 10q25 10q23.31 8p22 8p22 7q11.23 7p22 chromosome 
segments 19q12-q13.11 linked to prostate tumor aggressiveness
by use of the Gleason score as a quantitative trait. We have 
now completed finer-scale linkage mapping across this region 
that confirmed and narrowed the candidate region to 2 cM, 
with a peak between markers D19S875 and D19S433. We also 
performed allelic imbalance (AI) studies across this region 
in primary prostate tumors from 52 patients unselected for 
family history or disease status. A high level of AI was
observed, with the highest rates at markers D19S875 (56%) and 
D19S433 (60%). Furthermore, these two markers defined a
smallest common region of AI of 0.8 Mb, with 15 (29%)
prostate tumors displaying interstitial AI involving one or 
both markers. In addition, we noted a positive association 
between AI at marker D19S875 and extension of tumor beyond the
margin (P = 0.02) as well as a higher Gleason score (P = 0.06).
These data provide strong evidence that we have mapped a
prostate tumor aggressiveness locus to chromosome segments 
19q12-q13.11 that may play a role in both familial and 
non-familial forms of prostate cancer.

[download]

And got this output:

Xq27-q28
Xq11-q12
22q12.1
1q42.2-q43
19q
17p11
1q25
13q12.3
11p11.2
10q25
10q23.31
8p22
8p22
7q11.23
7p22
19q12-q13.11
19q12-q13.11

[download]

I hope that helps...

--
Allolex

In reply to Re: regexp and substitute operator problem by allolex
in thread regexp and substitute operator problem by dannoura

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