function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Feng & He, Hai', 1],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 2],
    ['Hirota, Shun K. & Yahara, Tetsukazu & Fuse, Kengo', 5],
    ['Info Flora', 4],
    ['Jarvis, Charlie', 1],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 2],
    ['Linnaeus, Carolus', 1],
    ['Ru, Jian & Ju, Wen-Bin & Deng, Heng-Ning & Xu, Bo & Zhou, Xiang', 1],
    ['Samain, Marie-Stephanie & Granados Mendoza, Carolina', 9],
    ['Samain, Marie-Stéphanie & Najarro, Francisco Hernández', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);