function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kitrytė, Neringa & Baltrūnaitė, Laima', 2],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 1],
    ['Nielsen, David H. & Robbins, Richard G. & Rueda, Leopoldo M.', 23],
    ['Reeves, Will K. & Durden, Lance A. & Wrenn, William J.', 1],
    ['Stekolnikov, Alexandr & Daniel, Milan', 3],
    ['Stekolnikov, Alexandr A.', 4],
    ['Stekolnikov, Alexandr A. & Saboori, Alireza & Shamsi, Mohsen', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);