function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Universitatis Daugavpiliensis', 1],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Berliner Entomologische Zeitschrift', 1],
    ['Biodiversity Data Journal', 2],
    ['Bulletin of the American Museum of Natural History', 26],
    ['Caribbean Journal of Science', 1],
    ['Coleopterists bulletin', 3],
    ['Entomo Helvetica', 4],
    ['Félix Galletti', 1],
    ['Insecta Mundi', 3],
    ['Linzer biologische Beiträge', 1],
    ['The Coleopterists Bulletin', 4],
    ['Transactions of the American Entomological Society', 17],
    ['ZooKeys', 32],
    ['Zootaxa', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=112)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);