function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ancey, C. F.', 8],
    ['Araya, Juan Francisco & Catalan, Ricardo', 2],
    ['Balashov, Igor', 1],
    ['Frank, Christa', 6],
    ['Garcia, Géraldine & Duffaud, Sylvain & Feist, Monique', 1],
    ['Haase, Martin & Meng, Stefan & Horsák, Michal', 2],
    ['Muratov, Igor V.', 2],
    ['Pilsbry, Henry A.', 6],
    ['Pilsbry, Henry A. & Cooke, C. Montague', 14],
    ['Walther, Frank & Hausdorf, Bernhard', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=43)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);