function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baker, Edward W. & Balock, John W.', 1],
    ['Ebrahimi, Najmeh & Noei, Javad', 1],
    ['Hernandes, Fabio A. & Skvarla, Michael J. & Fisher, Ray', 1],
    ['Khosravinejad, Maryam & Jafari, Shahriar & Paktinat-Saeij, Saeid', 1],
    ['Meyer, Magdalena K. P. & Ryke, P. A. J.', 1],
    ['Paktinat-Saeej, Saeed & Bagheri, Mohammad & Saboori, Alireza', 2],
    ['Paktinat-Saeij, Saeid & Damavandian, Mohammad Reza', 1],
    ['Rostami, Aylar & Bagheri, Mohammad & Jamshidi, Soleyman', 1],
    ['Sousa, J. M. de & Gondim Jr., M. G. C. & Lofego, A. C.', 1],
    ['Willmann, C.', 2],
    ['Wu, You-Fang & Jin, Dao-Chao & Yi, Tian-Ci & Chen, Jian-Xin', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);