function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anzeiger', 2],
    ['Blätter für Aquarien- und Terrarien-Kunde', 1],
    ['Check List', 1],
    ['Copeia', 8],
    ['Evencias', 1],
    ['Ichthyological Exploration of Freshwaters', 2],
    ['Ichthyological exploration of freshwaters', 1],
    ['Memoirs of the Carnegie Museum', 2],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 2],
    ['Neotropical Ichthyology', 88],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 3],
    ['Proceedings of the American Philosophical Society', 1],
    ['ZooKeys', 2],
    ['Zoological Journal of the Linnean Society', 35],
    ['Zootaxa', 62],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=217)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);