function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Crossley, D. A.', 1],
    ['Ebrahimi, Najmeh & Noei, Javad', 1],
    ['Fain, A.', 2],
    ['Fain, Alex & Barker, Gary M.', 1],
    ['Skoracki, Maciej & Schmidt, Karl-Heinz & Marciniak, Natalia', 53],
    ['Waki, Tsukasa & Shimano, Satoshi', 4],
    ['Willmann, C.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=66)',
    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);