function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Kandari, Manal & Anker, Arthur & Hussain, Sumaiah', 1],
    ['Almeida, Alexandre O. & Boehs, Guisla', 1],
    ['Anker, Arthur & Baeza, J. Antonio', 1],
    ['Ashrafi, Hossein & Dehghani, Amir & Sari, Alireza', 1],
    ['Bartilotti, Cátia & Salabert, Joana & Santos, Antonina Dos', 1],
    ['Clark, Paul F. & Ng, Peter K. L. & Fransen, Charles H. J. M.', 1],
    ['Filho, Petrônio Alves Coelho', 2],
    ['Grave, De & Chan, Tin-Yam & Okuno, Junji', 1],
    ['Komai, Tomoyuki & Okuno, Junji & Minemizu, Ryo', 3],
    ['Naderloo, Reza & Türkay, Michael', 1],
    ['Tavares, Marcos Domingos Siqueira & Carvalho, Leina', 1],
    ['Terossi, Mariana & Almeida, Alexandre O. & Buranelli, Raquel C.', 1],
    ['Xu, Peng & Li, Xin-Zheng', 3],
    ['Xu, Peng & Li, Xinzheng', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);