function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Allen, Gerald R. Dr.', 1],
    ['Andréfouët, Serge & Chen, Wei-Jen & Kinch, Jeff & Mana, Ralph', 1],
    ['Bariche, Michel & Fricke, Ronald', 1],
    ['Bleeker, Pieter', 3],
    ['Bogorodsky, Sergey V. & Alpermann, Tilman J. & Mal, Ahmad O.', 1],
    ['Hamilton, F. Buchanan', 1],
    ['Hyrtl, C. J.', 1],
    ['Lin, Chien-Hsiang & Nolf, Dirk', 1],
    ['Ng, H. H. Tan H. H.', 2],
    ['Saville-Kent, W.', 1],
    ['Whitley, Gilbert P.', 1],
    ['Zainal Abidin, Danial Hariz & Lavoué, Sébastien', 1],
    ['Çiçek, Erdoğan & Jawad, Laith & Eagderi, Soheil', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);