function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alekseev, Vitalii I. & Drotikova, Anna M. & Rozhina, Viktoria I.', 1],
    ['Bird, Matthew S. & Bilton, David T. & Perissinotto, Renzo', 3],
    ['Ciegler, Janet C. & Gemmill, Robert M.', 1],
    ['Darilmaz, Mustafa C. & İncekara, Ümit', 7],
    ['Hidalgo-Galiana, Amparo & Jäch, Manfred A. & Ribera, Ignacio', 3],
    ['Litovkin, S. V. & Efimov, D. A.', 2],
    ['Perkins, Philip D.', 188],
    ['Short, Andrew E. Z. & Fikáček, Martin', 2],
    ['Taşar, Gani Erhan', 1],
    ['Webster, Reginald P. & Sweeney, Jon D.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=209)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);