function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alexander, Timothy & Seehausen, Ole', 1],
    ['Anikin, V. P.', 1],
    ['Bleeker, Pieter', 4],
    ['Bànàrescu, P. M. & Nalbant, Teodor T.', 2],
    ['Chu, Y. - T.', 1],
    ['Girard, Charles Frédéric', 2],
    ['Jerdon, T. C.', 2],
    ['Kaya, Cüneyt & Bayçelebi, Esra & Turan, Davut', 5],
    ['McClelland, J.', 7],
    ['Mori, T.', 2],
    ['Nichols, J. T.', 3],
    ['Nurettin Meriç & Lütfiye Eryilmaz & Müfit Özulug', 2],
    ['Turan, Davut & Ekmekçi, Güler & Luskova, Vera & Mendel, Jan', 2],
    ['Turan, Davut & Kaya, Cüneyt & Bayçelebi, Esra & Aksu, İsmail', 2],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 4],
    ['Other (18)', 18]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);