function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['British Museum (Natural History)', 3],
    ['Dipteron', 1],
    ['Exploration scientifique de l\'Alge ́ rie', 1],
    ['F. W. Forstmann', 41],
    ['Faunus (Gistel\'s)', 1],
    ['Laurentii Salvii', 1],
    ['Laurentius Salvius', 13],
    ['Linzer biologische Beiträge', 1],
    ['Regio typographeo scholarum', 3],
    ['Zoologisches Magazin (Wiedemann)', 1],
    ['Zootaxa', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=85)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);