function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Universitatis Daugavpiliensis', 4],
    ['Amurian Zoological Journal', 8],
    ['Biodiversity Data Journal', 33],
    ['Caucasian Entomological Bulletin', 8],
    ['Christ. Gottl. Proft', 3],
    ['Johann. Edman', 3],
    ['Karl Schaumburg und Comp.', 7],
    ['Laurentii Salvii', 3],
    ['Laurentius Salvius', 32],
    ['Officina Libraria Kortii', 5],
    ['Proceedings of the Japanese Society of Systematic Zoology', 7],
    ['Proft et Storch', 6],
    ['Species Diversity', 4],
    ['ZooKeys', 43],
    ['Zootaxa', 36],
    ['Other (16)', 24]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=226)',
    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);