function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 8],
    ['Annales du Museum National d\'Historie Naturelle, Paris', 2],
    ['Biodiversity Data Journal', 21],
    ['Candollea', 10],
    ['Laurentius Salvius', 14],
    ['Linzer biologische Beiträge', 14],
    ['Nova Guinea, ser. 2', 6],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 51],
    ['PhytoKeys', 27],
    ['Phytotaxa', 109],
    ['Plant Ecology and Evolution', 18],
    ['Proceedings of the California Academy of Sciences', 36],
    ['Revue suisse de Zoologie', 3],
    ['Zoological Journal of the Linnean Society', 3],
    ['Zootaxa', 10],
    ['Other (17)', 23]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=355)',
    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);