function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breure, Abraham S. H. & Tardy, Emmanuel', 1],
    ['Jarvis, Charlie', 1],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 2],
    ['Linnaeus, Carolus', 1],
    ['Molino, Jean-François & Sabatier, Daniel & Grenand, Pierre', 5],
    ['Ruan, Yu-Qing & Yu, Yu-Long & Yu, Fen & Deng, Guo-Xing', 2],
    ['Suh, Soo-Jung', 2],
    ['Xu, Wei-Bin & Yang, Ping & Huang, Yu-Song & Zhang, Rui', 1],
    ['Zhang, Rui & Zhao, Wan-Yi & Liu, Yu-Lin & Fan, Yu & Tang, Ming', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);