function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 1],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Diptera Sveciae', 4],
    ['Entomo Helvetica', 1],
    ['Entomological magazine', 1],
    ['Felsecker', 2],
    ['Historia fisica y politica de Chile', 1],
    ['Journal of Natural History', 1],
    ['Linzer biologische Beiträge', 1],
    ['Magazin fu ̈ r insektenkunde / herausgegeben von Karl Illiger', 1],
    ['Rev Invest Agropec B Aires', 1],
    ['Revue suisse de Zoologie', 20],
    ['Zootaxa', 115]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=150)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);