function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beer, Johann Georg & Lam, Herman Johannes', 1],
    ['Blanco, Francisco Manuel', 1],
    ['Blume, Carl Ludwig von', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 3],
    ['Duan, Yi-Fan & Zhang, Libing', 2],
    ['Jarvis, Charlie', 2],
    ['Kumar, Vannaratta Veettil Naveen', 1],
    ['Moldenke, Harold Norman', 1],
    ['Monteiro, Francisca & Costa, Esperança Da & Kissanga, Raquel', 1],
    ['Ngumbau, Veronicah Mutele & Musili, Paul Mutuku & Hu, Guang-Wan', 2],
    ['Ridley, Henry Nicholas', 1],
    ['Tan, Yun-Hong & Li, De-Rong & Zhou, Shi-Shun & Chen, Yong-Jun', 1],
    ['Tan, Yun-Hong & Min, Dao-Zhang & Ding, Hong-Bo & Yang, Bin', 2],
    ['Tan, Yunhong & Li, Bo', 2],
    ['Tan, Yunhong & Li, Derong & Chen, Yongjun & Li, Bo', 1],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);