function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bakker, K.', 1],
    ['Doweld, Alexander B.', 1],
    ['Hicks, Gilbert Henry & Utteridge, Timothy Michael Arthur', 1],
    ['Info Flora', 1],
    ['Maddison, Wayne P. & Beattie, Imara & Marathe, Kiran', 6],
    ['Martin, Jon H. & Lau, Clive S. K.', 1],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Pole, Mike', 1],
    ['Ridley, Henry Nicholas', 1],
    ['Schlechter, Fridrich Richard Rudolf', 1],
    ['Schodde, Richard', 7],
    ['Suh, Soo-Jung', 1],
    ['Utteridge, Timothy Michael Arthur', 1],
    ['Verloove, Filip', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);