function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Azevedo, Celso O. & Xu, Zaifu & Beaver, Roger A.', 1],
    ['Beaver, Roger A.', 1],
    ['Cai, Yaping & Zhao, Yunyun & Shih, Chungkun & Ren, Dong', 5],
    ['ENGEL, MICHAEL S. & GRIMALDI, DAVID A.', 8],
    ['Engel, Michael S.', 1],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 4],
    ['Lepeco, Anderson & Melo, Gabriel A. R.', 6],
    ['Perez-Gelabert, Daniel E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);