function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bleeker, Pieter', 13],
    ['Blyth, E.', 1],
    ['Chen, J. - X. & Zhao, J. - F. & Zheng, J. - Z. & Li, D. - J.', 1],
    ['Chen, X. - Y. & Yang, J. - X. & Chen, Y. - R.', 1],
    ['Day, F.', 8],
    ['Herre, Albert W. C. T.', 12],
    ['Jerdon, T. C.', 1],
    ['McClelland, J.', 9],
    ['Ng, Casey Keat Chuan & Lim, Teow Yeong & Ahmad, Amirrudin', 1],
    ['Smith, H. M.', 1],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);