function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adansonia', 1],
    ['Annals of the Missouri Botanical Garden', 22],
    ['Australian Systematic Botany', 8],
    ['Biodiversity Data Journal', 15],
    ['Candollea', 2],
    ['Flora Helvetica', 1],
    ['Fossil Imprint', 1],
    ['Info Flora Schweiz', 1],
    ['Kew Bulletin', 1],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 17],
    ['Philippine Journal of Science C. Botany, Section C, Botany', 1],
    ['PhytoKeys', 7],
    ['Phytotaxa', 8],
    ['The London Journal of Botany; Containing Figures and Descriptions of Such Plants as Recommend Themselves by Their Novelty, Rarit', 6],
    ['Zootaxa', 13],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=105)',
    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);