function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brummitt, Neil A. & Utteridge, Timothy Michael Arthur', 1],
    ['Bubík, Miroslav & Doláková, Nela & Kvaček, Zlatko', 1],
    ['Chen, Feng & He, Hai', 1],
    ['Denk, Thomas & Sami, Marco & Teodoridis, Vasilis', 1],
    ['Iamandei, Stanila & Iamandei, Eugenia & Grădinaru, Eugen', 2],
    ['Ickert-Bond, Stefanie M. & Wen, Jun', 16],
    ['Info Flora', 1],
    ['Jarvis, Charlie', 2],
    ['Jin, Zi-Chao & Xu, Lian-Sheng & Xu, Ye-Chun & Chen, You-Sheng', 1],
    ['Ko, Chiun-Cheng', 2],
    ['Linnaeus, Carolus', 1],
    ['Martin, Jon H. & Lau, Clive S. K.', 1],
    ['Suh, Soo-Jung', 2],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 2],
    ['Wheeler, Elisabeth A. & Manchester, Steven R.', 2],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=39)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);