function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Feijoo, Alexander & Zuluaga, Luis Fernando', 1],
    ['Ferreira, Talita & James, Samuel W.', 1],
    ['Hernández-García, Luis Manuel & Sousa, Sandriel Costa', 2],
    ['James, Samuel W. & Gamiette, Franciane', 1],
    ['Kharkongor, Ilona J.', 4],
    ['Nguyen, Tung T. & Nguyen, Anh D. & Tran, Binh T. T.', 3],
    ['Plisko, Jadwiga D. & Nxele, Thembeka C.', 1],
    ['Plisko, Jadwiga Danuta', 1],
    ['Tiwari, Nalini & Paliwal, R. & Rashid, Azhar & Yadav, Shweta', 34]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=48)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);