function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brothers, Denis J.', 1],
    ['Cascio, Pietro Lo & Pagliano, Guido', 1],
    ['Gadallah, Neveen S. & Al Dhafer, Hathal M. & Aldryhim, Yousif N.', 8],
    ['Gadallah, Neveen S. & Brothers, Denis J.', 31],
    ['Gadallah, Neveen S. & Soliman, Ahmed M.', 5],
    ['Gadallah, Neveen S. & Soliman, Ahmed M. & Al-Shahat, Ahmed M.', 10],
    ['Gadallah, Neveen Samy & Soliman, Ahmed Mostafa', 5],
    ['Lelej, Arkady S. & Harten, Antonius Van', 1],
    ['Madl, Michael', 4],
    ['Schuster, Rudolf M', 2],
    ['Soliman, Ahmed M. & Gadallah, Neveen S.', 3],
    ['Torréns, Javier & Fidalgo, Patricio', 3],
    ['Torréns, Javier & Roig-Alsina, Arturo', 2],
    ['Yildirim, E.', 1],
    ['Yildirim, Erol', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=78)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);