<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0001-6002</journal-id>
<journal-title><![CDATA[Acta Médica Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. costarric]]></abbrev-journal-title>
<issn>0001-6002</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Médicos y Cirujanos de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0001-60022020000200054</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Intolerancia a la lactosa]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De Céspedes Montealegre]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Acta Médica Costarricense  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>62</volume>
<numero>2</numero>
<fpage>54</fpage>
<lpage>56</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0001-60022020000200054&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0001-60022020000200054&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0001-60022020000200054&amp;lng=en&amp;nrm=iso"></self-uri></article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wiley]]></surname>
<given-names><![CDATA[AS.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Lactose intolerance]]></article-title>
<source><![CDATA[Clinical Brief. Evol Med Public Health]]></source>
<year>2020</year>
<page-range>47-8</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perlman]]></surname>
<given-names><![CDATA[RL.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gene-culture coevolution: lactase persistence]]></article-title>
<source><![CDATA[Perlman RL.Evolution &amp; Medicine]]></source>
<year>2013</year>
<page-range>115</page-range><publisher-name><![CDATA[UK:OUP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<label>3.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Valencia]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Randazzo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Engfeldt]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Olsson]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Chávez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Buckland]]></surname>
<given-names><![CDATA[RJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Identification of novel genetic variants in the mutational hotspot region 14 kbupstream of the LCT gene in a Mexican population]]></article-title>
<source><![CDATA[Scand J Clin Lab Invest]]></source>
<year>2017</year>
<volume>77</volume>
<page-range>311-4</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
