function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 1],
    ['Blake, Joseph (Rev.)', 4],
    ['Conrad, Timothy Abbot', 3],
    ['Goto, Michiharu', 1],
    ['Leal, José H.', 1],
    ['Lightfoot, John', 1],
    ['Moore, Charles', 2],
    ['Oliver, P. Graham & Holmes, Anna & Killeen, Ian & Light, Janice', 1],
    ['Pacaud, Jean-Michel', 1],
    ['Röding, Peter Friedrich', 3],
    ['Somrup, Supannee & Sangsawang, Akkarasiri & McMillan, Nichanun', 1],
    ['Sowerby, James DeCarle', 3],
    ['Tëmkin, Ilya', 3],
    ['Tëmkin, Ilya & Printrakoon, Cheewarat', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);