function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abramov, A. E.', 2],
    ['Anichtchenko, Alexander V. & Shavrin, Alexey V.', 4],
    ['Behne, L & Gaedike, H', 9],
    ['Danilevsky, M. L. & Skrylnik, Yu. E.', 4],
    ['Danilevsky, Mikhail', 2],
    ['Danilevsky, Mikhail L.', 17],
    ['Dascălu, Maria-Magdalena', 4],
    ['Dascălu, Maria-Magdalena & Fusu, Lucian', 2],
    ['Faizi, Fardin & Nozari, Jamasb & Ghobari, Hamed', 4],
    ['Ilić, Nastas & Ćurčić, Srećko', 1],
    ['Karpinski, Lech & Szczepanski, Wojciech T. & lewa, Radoslaw', 19],
    ['Lazarev, Maxim A.', 13],
    ['Okutaner, Atilay Yağmur & Sarikaya, Asli Doğan & Sarikaya, Özkan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=83)',
    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);