function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Joharchi, O. & Babaeian, E.', 2],
    ['Moraza, Maria Lourdes', 1],
    ['Nemati, Alireza & Joharchi, Omid & Babaeian, Esmaeil', 4],
    ['Nemati, Alireza & Khalili-Moghadam, Arsalan', 6],
    ['Nemati, Alireza & Riahi, Elham & Khalili-Moghadam, Arsalan', 1],
    ['Saboori, Alireza & Shirvani, Zeinab', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);