function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gu, Jin-Ying & Zhao, Chang-Lin', 2],
    ['Huang, Hong-Yan & Zhao, Jie & Zhang, Ping & Ge, Zai-Wei', 9],
    ['Jarvis, Charlie', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 2],
    ['Kirby, W. F.', 2],
    ['Lamarck, J. B. P. A. de M. de', 1],
    ['Liu, Wen-Hao & Yan, Jun & Deng, Peng-Tao & Qin, Wei-Qiang', 3],
    ['Petersen, Ronald H. & Hughes, Karen W. & Justice, Jay', 2],
    ['Ralaiveloarisoa, Anna Berthe & Liimatainen, Kare', 1],
    ['Reschke, Kai & Lotz-Winter, Hermine & Fischer, Christian W.', 1],
    ['Ullah, Tariq Saiff & Firdous, Syeda Sadiqa & Shier, Wayne Thomas', 1],
    ['Yang, Kun L. & Yang, Zhu L. & Zhang, Ming & Wang, Geng-Shen', 1],
    ['de la Fuente, Javier Isaac & García-Jiménez, Jesús', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);