function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 1],
    ['Barrientos, Jose A. & Prieto, Carlos E. & Pina, Silvia', 1],
    ['Polchaninova, N. & Gnelitsa, V. & Terekhova, V. & Iosypchuk, A.', 1],
    ['Seropian, Armen & Bulbulashvili, Natalia & Krammer, Hans-Joachim', 1],
    ['Sherwood, Danniella & Marusik, Yuri M. & Sharp, Adam', 1],
    ['Tang, Jiaxin & Liang, Wei & Shi, Haitao & Gao, Caixia', 1],
    ['Zamani, Alireza & Al-Yacoub, Ghassan A. Ali', 1],
    ['Zamani, Alireza & Chatzaki, Maria & Esyunin, Sergei L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);