function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des kaiserlich-königlichen naturhistorischen Hofmuseums', 2],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Candollea', 49],
    ['Check List', 10],
    ['Cryptogamie, Bryologie', 21],
    ['Entomologist\'s monthly magazine', 3],
    ['Entomologist’s Monthly Magazine', 2],
    ['Journal of Natural History', 2],
    ['Memoires de la Societe geologique de France, 2', 3],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 2],
    ['PhytoKeys', 14],
    ['Phytotaxa', 33],
    ['Proceedings of the California Academy of Sciences', 2],
    ['Publications of the Field Museum of Natural History, Zoölogical', 2],
    ['Zootaxa', 4],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=155)',
    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);