function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Costa, Samuel Geremias Dos Santos & Klompen, Hans', 2],
    ['Elverici, Mert & Buğa, Evren & Sevsay, Sevgi', 1],
    ['HAITLINGER, Ryszrd & ŠUNDIĆ, Miloje', 2],
    ['Haarder, Simon & Mąkol, Joanna', 1],
    ['Haitlinger, Ryszard & Kekeunou, Sévilor & Łupicki, Dariusz', 2],
    ['Hakimitabar, Masoud & Fadaei, Elnaz & Husemann, Martin', 1],
    ['Hakimitabar, Masoud & Fadaei, Elnaz & Tork, Mehdi', 1],
    ['Kamran, Muhammad & Alatawi, Fahad J.', 1],
    ['Mayoral, J. G. & Barranco, P.', 3],
    ['Saboori, Alireza & Shirvani, Zeinab', 6],
    ['Sedghi, A. & Ravan, S. & Saboori, A. & Hakimitabar, M.', 2],
    ['Seiedy, Najmeh Kiany Marjan & Hakimitabar, Masoud', 1],
    ['Stalstedt, Jeanette & Laydanowicz, Joanna & Lehtinen, Pekka T', 2],
    ['Šundić, Miloje & Haitlinger, Ryszard & Dragana, Milošević', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);