function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carrenho, Renan & Rodrigues, Higor D. D.', 3],
    ['Fieber, Franz Xaver', 1],
    ['Ghahari, Hassan & Chérot, Frédéric', 3],
    ['Linnavuori, Rauno E.', 6],
    ['Norbiato, Margherita & Dioli, Paride & Cianferoni, Fabio', 3],
    ['SCHUH, RANDALL T.', 1],
    ['TASZAKOWSK, Artur & PASIŃSKA, Agnieszka', 3],
    ['Usinger, Robert L.', 5],
    ['Vinokurov, N. N. & Rudoi, V. V.', 4],
    ['Vinokurov, Nikolay N. & Rudoi, Valentin V.', 2],
    ['Yasunaga, Tomohide & Schwartz, Michael D. & Chérot, Frédéric', 1],
    ['Yazici, Gülten & Yildirim, Erol', 3],
    ['Zamani, Mozhgan & Hosseini, Reza', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    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);