function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anzeiger', 1],
    ['Biodiversity Data Journal', 1],
    ['Biol. Cent. - Amer.', 1],
    ['Bulletin of the United States Fish Commission', 1],
    ['Bulletin of the United States National Museum', 1],
    ['Check List', 4],
    ['Copeia', 2],
    ['Ichthyological Research', 1],
    ['Longman’s', 1],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 3],
    ['Natuurkundige Verhandelingen van de Hollandsche Maatschappij der Wetenschappen te Haarlem, Series 2', 2],
    ['Proceedings of the Linnean Society of New South Wales', 3],
    ['Proceedings of the Zoological Society of London, B', 2],
    ['Schweizerbart', 1],
    ['Zootaxa', 17],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=43)',
    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);